Unlike Windows 7 and XP you will need a password in Windows 8.
Would you believe, I have managed to do this with only 6 letters and numbers, i.e 4 letters and 2 numbers, none in upper case, none in Farsi, none in Betelgeuse. I have since simplified it further to just 4 numbers. I don't even have to hit enter, just the four numbers, like 1234.
You go to PC Settings - Users - Your account, and select using a PIN.
Makes logging in a breeze and still quite a challenge to Al-Qaeda.